The former ICOS bibliography project had a separate website.
With Zotero, the Bibliography Group of the International Council of Onomastic Sciences (ICOS) has created an open bibliographical resource for all who are interested in the scientific study of names. The project is carried out under the responsibility of ICOS. The Bibliography is made by members of the ICOS Bibliography Group and volunteers from many countries. Information about this work in progress can be obtained from the secretary of the ICOS Bibliography Group, Dr. Evgeny Shokhenmayer (firstname.lastname@example.org). The Zotero libraries provide a powerful way to share research collections and work closely with colleagues on a bibliography.
See here for the collection of the ICOS Bibliography Group.